I don't think it's thick enough to use on it's own under bc, even with a dam.
I use a salted caramel bc as a filling and frosting. When I make it, I replace 1/2 the liquid with caramel sauce. I make my own caramel sauce but you could certainly do the same thing with the Smuckers.
I've mixed dried fruit and nuts (craisins, apples, pecans, walnuts) into Smuckers caramel topping. Lots of fruit/nuts so the caramel barely holds it together. A spoonful of the mixture sits atop muffins. Also works if the pieces are small and drizzled over the tops of iced cupcakes. It's delicious. When I was experimenting, it was so good I ate it all with a spoon and had to make more.